A.Basic requiremnet：

1.Assembly must be carried out in accordance with the design, technical requirements, these regulations and relevant standards.

2.Assembly environment must be clean. The assembly environment temperature, humidity, dustproof quantity and shockproof lighting of high-precision products must meet relevant regulations.

3.All parts (including purchased and outsourced parts) must have inspection certificate before assembly.

4.Parts must be cleaned and cleaned before assembly, without burr, flaking, oxide skin, rust, chip, sand, dust and oil, etc., and should meet the corresponding cleanliness requirements.

5.Parts shall not bump, scratch and rust during assembly.

6.Parts with wet paint shall not be assembled.

7.For parts with relative movement, lubricating oil (grease) should be added between contact surfaces during assembly.

8.The relative position of all parts and components should be accurate after assembly.

9.Special measures should be taken when special parts must be operated on the machine. Protective cover should be used to cover the stomped parts. The operator must wear flat shoes to prevent damage to the paint film.

B.Join method requirements

a.Screw and bolt connection

1.Do not strike or use improper screwdriver or wrench when fastening screws, bolts, and nuts. Do not damage the screw slots, nuts, screws, and bolt heads after fastening.

2.Fasteners with specified tightening torque requirements should be tightened by torque wrenches according to the specified tightening torque. For bolts without specified tightening torque, refer to appendix 1.

3.If multiple screws or bolts are used to secure the same part, tighten the screws (bolts) in a clockwise, staggered, and symmetrical manner. If positioning pins are available, start with the screws or bolts near the positioning pins.

4.When double nuts are used, thin nuts should be installed before thick nuts.

5.After screws, bolts and nuts are tightened, the screws and bolts should generally expose 1-2 pitch of the nut.

6.After screws, bolts and nuts are tightened, the supporting surface should be close to the fastening part.

b. riveting

1.Riveting materials and specifications must meet the design requirements. The rivet hole shall be processed in accordance with relevant standards.

2.The surface of the riveted parts shall not be damaged or deformed during riveting.

3.Except for special requirements, the head of rivet must be in close contact with the riveted parts and should be smooth and round.

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